排灌机械工程学报2013，Vol.31Issue(6)：511-516,6.DOI:10.3969/j.issn.1674-8530.2013.06.011
空气净化机净化动力学分析及气流场数值模拟
Dynamic analysis and numerical simulation of internal wind field in air purification
摘要
Abstract
To provide foundation for optimal design of the filter and the inlet and outlet of the tunnel,dynamics method was used to analyze the mechanism of air purifier and deduce theoretically filter resistance in absorption process.Starting from the internal air flow field in an air purifier,a geometric model of internal wind field was built and porous medium was adopted to simulate the filter.Fluent software was applied to numerically simulate internal wind flow.The different values of pressure field and velocity field were measured and analyzed on three cross-sections of different heights (0.05 m,0.10 m and 0.15 m) with inlet velocity changing from 1 to 5 m/s.The results show that the wind flow remains steady when inlet velocity is 1-2 m/s,HEPA filter produces the strongest flow resistance at section of 0.10 m high.Therefore,the area of air inlet and outlet should be increased to be consistent with the main wind channel so as to get better internal flow field and meanwhile to avoid vortex phenomenon and lower flow superposition effect at the outlet.Fluent software simulation produces effective results and can provide theoretical basis for solving flow field issues in practice.关键词
空气净化机/气流场/动力学分析/多孔介质/数值模拟Key words
air purifier/ wind field / dynamic analysis / porous medium / numerical simulation分类
农业科技引用本文复制引用
张西良,张媛,高文祥,邓志辉,罗胜,徐云峰..空气净化机净化动力学分析及气流场数值模拟[J].排灌机械工程学报,2013,31(6):511-516,6.基金项目
国家自然科学基金资助项目(51175230) （51175230）
江苏省科技支撑计划项目(BE2010347) （BE2010347）
